ACT Math

Front

What is a pie chart?

Back

A pie chart is a circular statistical graphic that is divided into slices to illustrate numerical proportions. Each slice represents a category's contribution to the total.

Front

How do you calculate the percentage of a category in a pie chart?

Back

To calculate the percentage of a category in a pie chart, divide the value of the category by the total value and multiply by 100.

Front

What is the formula for the sum of interior angles in a polygon?

Back

The sum of the interior angles of a polygon with n sides is given by the formula (n-2) × 180 degrees.

Front

What is the relationship between the angles in a trapezoid?

Back

In a trapezoid, the sum of the interior angles is always 360 degrees, and the angles on the same side of the trapezoid are supplementary.

Front

What is an isosceles right triangle?

Back

An isosceles right triangle is a triangle with two equal sides and one 90-degree angle. The angles opposite the equal sides are each 45 degrees.

Front

How do you find the perimeter of a triangle?

Back

The perimeter of a triangle is found by adding the lengths of all three sides.

Front

What is the formula for the mean (average)?

Back

The mean is calculated by adding all the values together and dividing by the number of values.

Front

What is a central angle in a circle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii that extend to the circumference.

Front

How do you convert hours into degrees for a circle graph?

Back

To convert hours into degrees for a circle graph, use the formula: (hours/total hours) × 360 degrees.

Front

What is the definition of a trapezoid?

Back

A trapezoid is a four-sided figure (quadrilateral) with at least one pair of parallel sides.